Gitzo Series 3 Panoramic Discs with D Profile Quick Release are designed to allow panoramic photography on Gitzo tripods that lack the capability to display horizontal angles. They can be attached to the top of a Gitzo Systematic Leveling Base, on top of or underneath a head without an independent panning axis, or fixed directly to the top of Gitzo tripod columns to replace the tripod upper disc. They have multiple built-in bubble levels, and the D Profile quick-release system is fully Arca-type compatible.